Fair-stitch machine.



No. 723,898. PATENTD MAR. 31,- 1903.

E. F. MOWER.

FAIR STITCH MACHINE.

APPLIoATIoN FILED JULY 12, 1900. No Mon-EL. s sHEnTs-snnm' 1.

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No. 723,898. f PATBNTBD MAR. 31, 19h35;

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FAIR STITCH MACHINE. APvPLIOATION IILED JULY 12, 1900.

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,898. PATENTED MAR. 31, 190s. l E. P. MOWBR.

PAIR STITCH MACHINE.

APPLICATION FILED JULY 12. 190,0.`

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WITNESS E5- NIT-ED STATl-:sv

PATENT nunon.

.EDWIN F. MOWER, OF IBOSTON, MASSACHUSETTS.

FAIR-.STITCH IVIACHIN E.

SPECIFICATION forming part of Letters Patent No. 723,898, dated March31, 1903.

pplication filed July 12, 1900. Serial No. 23,355.- (No model.)

To all whom, t may con/cern:

Be it known that I, EDWIN F. MowER, of Boston, in the county of Suiolkand State of Massachusetts, have invented a new and useful Improvementin Fair-Stitch Machines, of which the following, taken in connectionwith .the accompanying drawings,`is a'specication.

My invention relates to a-fair-'stitch machine in which a reverse-hookneedle and a thread-placer are used in connection with afour-motionloop-controller; and it consists in the arrangement and construction ofthose parts that are immediately engaged in forming the stitch, theobject being to make a cheap, durable, and sure-working machine. Thisobject I attain by the mechanism shown in the accompanying drawings, inwhich;-

tions of theloop-controller and its operating mechanism.

In this machinef'that is, a machine in which a needle with a reversedhook is used, as shown in Fig. 9-a thread-carrier is required. I willnow proceed to describe this thread-carrier. It consists of a swinginglever T, pivoted at T and operated by camgroove T2. Near the lower endof this threadcarrier I have a guide, as shown at T0. At

the extreme lower end of the thread-carrier av hole Tt1 is made for thethreadto pass through. The action of the thread-carrier issimply to drawthe thread across the front of the needle, so as to insure itsengagement with the hook, so that every downward movement of the needlewill carry a loopthrough the stock W into the field of action oftheloop-controller H10. The needle and awl bars are driven by the disk C,Fig. l, on the main shaft B. This disk C has two crank-pins mounted uponit in the usual manner of the double crankpin disk. A pitrnan C3connects one of the crank-pins to the awl-bar D, and the pitman C2 connect-s the other crank-pin to the needlein the direction of the dottedarc h h, Fig. l.

These motions are given to the loop-controller H10 by the eccentric Hand cam K. (See Fig. 1.) The eccentric H Works through thelink H',pivot-pin H2, lever H3 H5, which swings on the fulcrum H4, link H0, andpivot-joint H7, and loop-controller lever H0, which tilts ou a movingfulcrum H8 and causes the loop-.controller H10 to move toward or away ina vertical arc from the stock YV or in the general direction ofthedotted arch h. The other motionsnamely, the nearly horizontal ones-areimparted by the eccentric K working through the link K', pivot-pin K2,lever K10, (having a fulcrum at K3,) link K5, pivoted at K4 and K0,bell-crank lever K7 K8, having a fixed f ulcrumV at K0 and. connected tothe loop-controller lever H0 at HS. The motion thus communicated causesthe loop-controller H10 to move. nearly horizontally in the direction ofthe vdottedarc k k.

In addition to the vordinary presser-foot P an additional laterallyadjustable stitchholder G is used. It is attached to the presserfoot barP by screws G G'. f

The method of forming the stitch is illustrated in Figs. 2 to 8,inclusive. Figs. 2 and 3 show the starting positions. In Fig. 4 thethread is shown as carried by the needle E' just through the stock W.For convenience in describing the formation of the stitch, We assumethat one has beenformed asillustrated in Fig. 4. The needle continuesinits downward motion until it has varrived at its lowest position andhas just begun its upward movement. This will cause a loop to form, asshown in Fig. 5. Now the loop-controller H10 will takev the loop and theneedle will go upward, the loop-controller following but keeping thethread taut. (See Figs. 5 and 6:) A continued upward movement of theneedle and of the loop-controller H10 will and to follow it keeping it;taut, and to Withdraw from it, whereby the thread-carrier may draw thethread taut and thus complete the stitch; and means for operating thesame; substantially as and for the purpose set forth.

In testimony whereof I have signedw my name to this specification, inthe presence of two subscribing Witnesses, on this 13th day of June, A.D. 1900.

EDWIN F. MOXVER.

Witnesses:

FRANK G. PARKER, HARRY C. GLAPP.

